aspiration vs breathing in

aspiration and breathing in both are nouns.

Word	Noun	Adjective	Verb	Adverb
aspiration	Yes	No	No	No
breathing in	Yes	No	No	No

As nouns, aspiration and breathing in are synonyms defined as:

aspiration and breathing in: the act of inhaling; the drawing in of air (or other gases) as in breathing

Other synonyms of aspiration include inhalation, inspiration, intake.

aspiration (noun)	breathing in (noun)
the act of inhaling; the drawing in of air (or other gases) as in breathing	the act of inhaling; the drawing in of air (or other gases) as in breathing
a will to succeed
a manner of articulation involving an audible release of breath
a cherished desire